Android: How to bring focus to the updated view

Question

I am loading data in a view having 3 rows(LinearLayout) with each row having 3 TextView, and updating the same view if the focus is on last TextView of a row and KeyEvent.KEYCODE_DPAD_RIGHT.

I am able to update the view on KeyEvent.KEYCODE_DPAD_RIGHT but the focus is not coming back to the same row of the updated view.

Question: When the View is updated i want the focus to remain in the same row of the updated view,

. . .

  <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignTop="@id/linearlayout03" >

            <LinearLayout
                android:id="@+id/linearLayout1"
                android:layout_width="fill_parent"
                android:layout_height="74dp"
                android:background="@drawable/background" >
            </LinearLayout>

            <LinearLayout
                android:id="@+id/linearLayout2"
                android:layout_width="fill_parent"
                android:layout_height="74dp"
                android:background="@drawable/background" >
            </LinearLayout>

            <LinearLayout
                android:id="@+id/linearLayout3"
                android:layout_width="fill_parent"
                android:layout_height="74dp"
                android:background="@drawable/background" >
            </LinearLayout>
 </LinearLayout>

. . .

to fill the rows of linear layout

 public void listfill(final LinearLayout ll, CustTextView[] tv, final List<Eventinfo> name, final int curf) {
        final List<Eventinfo> nameref = name;
            ll.removeAllViews();
            if (name.size() == 0) {
                name.add(new Eventinfo(true));
                name.add(new Eventinfo(true));
                name.add(new Eventinfo(true));
            }
            tv = new CustTextView[name.size()];
            for (int i = 0; i < name.size(); i++) {
                final Eventinfo evinfo = name.get(i);
                Utils.println("ev info: "+evinfo);

                tv[i] = new CustTextView(getApplicationContext());
                LinearLayout.LayoutParams params2;
                if (i != (name.size()-1)){
                    int x = 0;
                    if (i == 0){
                        tv[i].setViewLeft(true);
                        if (!name.get(0).isEmpty)
                            x = (int) calwidth(name.get(0).getEtime());
                        else 
                            x = (int) calwidth(name.get(0).getDur() + 0);
                    }else
                        x = (int) calwidth(name.get(i).getDur() + 0);

                        params2 = new LinearLayout.LayoutParams(
                                (int) x, 74);
                }
                else{
                    tv[i].setViewRight(true);
                    params2 = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, 74);
                }
                tv[i].setLayoutParams(params2); 
                tv[i].setText(name.get(i).getName());
                tv[i].setTextColor(Color.WHITE);
                System.out.println(" .... " + name.get(i).getName() + i);
                final int z = i;

                tv[i].setOnFocusChangeListener(new methodOnFocusinlistfill(i, curf, nameref.get(i), tv[i].getisViewRight(), tv[i].getisViewLeft()));

                tv[i].setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        if(z == 0){
                            String url = proxy.getUrl(gevinfo.getCid());
                            // call the tune channel API..
                            mediaPlayer.tune(url);
                        }
                    }
                });
                ll.addView(tv[i]);
            }
}

the above method is called to fill(Update) view on key event given below

  case KeyEvent.KEYCODE_DPAD_RIGHT:       
  if (( cur_focus == 8 || cur_focus == 9 || cur_focus == 10 ) && newRight //to check if it is the last textview){
                stTime.add(Calendar.HOUR,1);
                stTime.add(Calendar.MINUTE,30);
                enTime.add(Calendar.HOUR,1);
                enTime.add(Calendar.MINUTE,30);

                getStimeAndEtime();// will gives the start and end time 
                getEventinforclist();// based on start and end time it will get the data for the respective time duration and calls fill layout to update the view
            }

Please help and thanks in advance.

@GrIsHu please check i have included the code which is needed to manage focus — bala, Dec 02 '13 at 06:13

score 1 · Answer 1 · answered Dec 02 '13 at 05:38

1

Try calling the requestFocus method on the view.

    view.requestFocus();

For this method to work, your view need to be focusable. set the focusable property of the view to true in xml or programatically.

answered Dec 02 '13 at 05:38

Sayed Jalil Hassan

2,535
7
30
42

thanks for reply, but i want the focus to get back to the child view added in the linear layout i.e first TextView of that row from where it updated the view. – bala Dec 02 '13 at 06:19
the view i mentioned above could be any view, a parent or a child. in your case the first text view is itself a view and you can call the request focus method on it. hope it works for you – Sayed Jalil Hassan Dec 02 '13 at 06:27
focus is coning to the updated view but not to the first element of the respective row. It is always coming to the first element of first row even if navigated from other rows. – bala Dec 03 '13 at 09:13

score 0 · Answer 2 · answered Dec 05 '13 at 04:23

thanks to @sayed.jalil for help, The changes made in above code is in .xml file included

      android:descendantFocusability="afterDescendants"
      android:focusable="false"

in all the three LinearyLayout so that the focus will move to the child view which are TextViews, and included new method 'returnfocus()' to request focus based on current focus, which is called in

case KeyEvent.KEYCODE_DPAD_RIGHT:       
if (( cur_focus == 8 || cur_focus == 9 || cur_focus == 10 ) && newRight //to check if it is the     last textview){
            stTime.add(Calendar.HOUR,1);
            stTime.add(Calendar.MINUTE,30);
            enTime.add(Calendar.HOUR,1);
            enTime.add(Calendar.MINUTE,30);

            getStimeAndEtime();// will gives the start and end time 
            getEventinforclist();// based on start and end time it will get the data for the respective time duration and calls fill layout to update the view
            returnfocus();//new method added to retain the focus in same row
        }

and returnfocus() method is,

public void returnfocus(){
    System.out.println("current focus in returnfocus: "+cur_focus);

    if (copycur == 8){
        l1.requestFocus();
    }else if (copycur == 9){
        l2.requestFocus();
    }else if (copycur == 10){
        l3.requestFocus();
    }
}

Android: How to bring focus to the updated view

2 Answers2